73847489 has 2 divisors, whose sum is σ = 73847490. Its totient is φ = 73847488.

The previous prime is 73847443. The next prime is 73847491. The reversal of 73847489 is 98474837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55011889 + 18835600 = 7417^2 + 4340^2 .

It is an emirp because it is prime and its reverse (98474837) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73847489 is a prime.

Together with 73847491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73847429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36923744 + 36923745.

It is an arithmetic number, because the mean of its divisors is an integer number (36923745).

Almost surely, 2^73847489 is an apocalyptic number.

It is an amenable number.

73847489 is a deficient number, since it is larger than the sum of its proper divisors (1).

73847489 is an equidigital number, since it uses as much as digits as its factorization.

73847489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 50.

The square root of 73847489 is about 8593.4561731587. The cubic root of 73847489 is about 419.5450269720.

The spelling of 73847489 in words is "seventy-three million, eight hundred forty-seven thousand, four hundred eighty-nine".